It depends.
Greed and misuse/abuse of power/trust is a common human tendency. There's no denying that.
It depends on how feasible these operations are at scale and what value they gain from this - some companies might have such metrics to determine your worth.
(and of course what are the risks involved in doing this - risk/reward ratio per person??)
I don't know how it works. Backdoors might not just be for the company alone.